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SECTION 1300

CITY OF FARGO SPECIFICATIONS

REVISED 2019


WATER MAINS

PART 1

DESCRIPTION OF WORK

The work to be done under this section of the Specifications and the accompanying plans consists

of the furnishing of all labor, material, accessories and equipment necessary to construct water mains

in the City of Fargo. The work includes excavation, furnishing, laying and jointing pipe; making

connections to existing water mains as necessary; installing new valves, valve boxes, or valve

manholes; installing hydrants; protecting existing utilities and public and private property;

backfilling trenches and other work as may be necessary to in order that the work may be completed

in accordance with these Specifications and the plans accompanying them.

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PART 2

MATERIALS

All products (treatment chemicals and material) that may come into contact with water intended for

use in a public water system shall meet American National Standards Institute (ANSI)/National

Sanitation Foundation (NSF) International Standards 60 & 61, as appropriate. A product will be

considered as meeting these standards if so certified by NSF, The Underwriters Laboratories, or

other organizations accredited by ANSI to test and certify such products.

2.1. POLYVINYLCHLORIDE (PVC) PRESSURE PIPE

2.1.1. MATERIAL

The PVC material shall conform to the requirements of ASTM D-1784, Class 12454-B.

2.1.2. PIPE MANUFACTURE

The pipe shall be marked to indicate compliance with NSF 61, Factory Mutual (FM) and

be either marked or tagged with the Underwriter Laboratory (UL) approval. All PVC

pressure pipe shall be manufactured in accordance with the latest revision of AWWA

Standard C900. The pipe shall be DR 18.

2.1.3. PIPE JOINTS

PVC pipe joints shall be rubber gasketed conforming to the requirements of ASTM D-

3139-98 or the latest revision.

2.2. DUCTILE IRON PIPE

2.2.1. MATERIAL

Ductile iron pipe shall conform to AWWA C-151 Standards.

2.2.2. PIPE MANUFACTURE

Ductile iron pipe shall be American made and conform to a Class 53 standard thickness

class unless otherwise specified.

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2.2.3. PIPE JOINTS

Ductile iron pipe joints shall be slip joints with rubber gaskets and meet AWWA C-111

Standards.

2.2.4. LINING

The ductile iron pipe shall be lined with cement mortar in accordance with AWWA C104.

Cement for mortar shall be Portland Cement conforming to current ASTM specifications.

The thickness of the lining shall not be less than the following:

1/16” for 3 to 12 inch pipe

3/32” for 14 to 24 inch pipe

1/8” for pipe larger than 30 inches

2.2.5. PIPE COATINGS

Ductile iron pipe shall be coated with a 1 mil asphaltic coating.

2.2.6. POLYETHYLENE WRAP

All ductile pipe shall be wrapped with polyethylene plastic film having a minimum

thickness of 8 mils or with a cross woven polyethylene plastic film having a minimum

thickness of 4 mils. All water service taps on ductile iron main shall be wrapped for a

minimum distance of 3 feet from the water main.

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2.3. FITTINGS

All fittings shall be PVC or Ductile Iron, and shall be “push-on” or “slip-joint” unless specified

otherwise in the plans or special instructions to bidders. Cast iron fittings will be used only when

approved by the Engineer.

2.3.1. PVC FITTINGS

PVC fittings shall be injection molded conforming to the requirements of AWWA C-907

and carry a working pressure of at least 150 psi. Molded fittings shall be mode of PVC

compound with a minimum hydrostatic design basis of 4,000 psi.

2.3.2. DUCTILE IRON FITTINGS

Ductile Iron fittings shall conform to AWWA C153, and shall be cement mortar lined on

the interior and bituminous coated on the exterior. Cement lining shall conform to AWWA

C104, and joints shall conform to AWWA C111. All ductile iron fittings shall be wrapped

with polyethylene plastic film as specified for the ductile iron pipe, which must be securely

fastened to the pipe on each side of the fitting. Mechanical joint fittings, where allowed by

the Engineer, shall be bid complete with gaskets, glands, and stainless steel bolts.

2.3.3. COUPLINGS

All pipe couplings up to and including 12” in diameter shall be epoxy coated ductile iron

meeting or exceeding the requirements of ASTM A 536, grade 65-45-12. Couplings shall

meet the requirements of AWWA Standard C219. The coupling shall carry a minimum

working pressure of 300 psi, having end rings that are segmented and joined with a pinless

hinge, gaskets formed from virgin Nitrile Butadiene Rubber (NBR) compounded for water

and sewer service in accordance with ASTM D2000, and 304 stainless steel

armor. Fasteners shall be 304 stainless steel.

Couplings up to and including 12” in diameter shall be Romac Macro HP, Hymax DI High

Pressure, or approved equal. Couplings larger than 12” shall be mechanical-joint long

body sleeves meeting the requirements of AWWA C153.

2.4. GATE VALVES

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2.4.1. GENERAL

Cast iron resilient-seated gate valves and tapping valves shall conform to the latest

requirements of AWWA C509. Ductile iron resilient-seated gate valves and tapping valves

shall conform to the latest requirements of AWWA C515. The valve seats shall be able to

withstand 200 psi and the body shall withstand 400 psi.

2.4.2. CONSTRUCTION

Size: 4” to 36”

Joints: Joints shall be provided with AWWA standard bell ends, flanged ends

or mechanical joint bell ends as required for the type of pipe being used.

Gaskets: Rubber.

Operation: Open left (counter clockwise) w/ 2 inch operating nut.

Bolting: All body bolts shall be stainless steel.

Stem & seals: The stem shall be made of bronze and shall have two “O” rings to provide

sealing.

Coating: All valves shall be coated inside and out in accordance with the latest

revision of AWWA C-550.

Acceptable manufacturers are American Flow, Clow, Mueller, U.S. Pipe or Waterous.

16” and larger valves shall be installed horizontally with bevel gear actuators.

2.5. VALVE BOXES

2.5.1. GENERAL

Valve boxes are required on all valves. All valve boxes shall be heavy-duty cast or ductile

iron in accordance with ASTM A 48 30B material specification with a minimum tensile

strength of 30,000 psi, have screw type adjustment, 5 1/4” shaft, and be furnished with

heavy-duty cast or ductile iron bases and covers. Covers shall be made in the USA and

cast with “WATER” on them. Valve boxes shall be three-piece type, adjustable from 62

to 82 inches in height, except that they shall in all cases be supplied and installed with a

sufficient quantity of additional intermediate section(s) to allow the top of the installed box

to be set at finished grade at mid-height of adjustment.

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2.5.2. VALVE BOX ADAPTOR

Rubber valve box adaptors shall be installed for all valve boxes on all gate valves and

butterfly valves. The adaptor shall be the Valve Box Adaptor II as manufactured by

Adaptor, Inc. or as approved by the Engineer.

2.6. TAPPING SLEEVES AND VALVES

Valves shall be in accordance with the latest revision of AWWA C-509. The sleeves shall be

mechanical joint with stainless steel bolts or stainless steel tapping sleeves with a stainless steel

flange.

2.7. HYDRANTS

2.7.1. GENERAL

Hydrants shall be non-jacket types meeting the latest revision of AWWA C-502. All

hydrants shall be equipped with a break-off traffic flange and shall be capable of being

extended in 6” increments.

2.7.2. CONSTRUCTION

Main valve opening: 5” minimum.

Hydrant barrel: 7 3/8” minimum inside diameter.

Type of shut-off: Compression.

Inlet connection: 6” size- bell or mechanical joint type.

Nozzles: 2-2 1/2” hose nozzles; 1-4 1/2” pumper nozzle.

Nozzle threads: National Standard threads.

Bury depth: 8 feet 6 inches.

Operating & cap nuts: City of Fargo Standard (NST).

Direction to open: To the left (counter-clockwise).

Paint: City of Fargo Standard Red above ground line.

Bolts: All bolts below ground shall be stainless steel.

Hydrants shall be wrapped with polyethylene plastic film as per section 2.2.6.

POLYETHYLENE WRAP.

Acceptable manufacturers are Waterous WB67 Pacer and American Darling B62B-1.

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2.8. HYDRANT MARKERS

2.8.1. GENERAL

Hydrant markers shall be mounted on both sides of the post to face traffic (perpendicular

to the curb) and shall be installed with each hydrant.

POST: Green U-channel- 2 lb. per foot & 9 feet long with 2 foot bury.

SIGN: 4” by 7” by 0.063” aluminum covered with Engineer Grade reflective sheeting, Red

hydrant symbol on white background.

2.9. SERVICE CONNECTIONS

All service connections to PVC pipe shall be stainless steel, double bolt (minimum) service saddles.

Service saddles shall have stainless steel washers between the nut and the plastic washer to equalize

tightening stress. Rubber tapered gaskets shall be required to resist circumferential and longitudinal

forces along with O-ring or flat gaskets for hydraulic seal. Saddle bolts shall be tightened to the

manufacturers recommended tightness and verified with a torque wrench. Bolt tightness shall be

rechecked with a torque wrench after the pipe tap is complete.

Approved saddle types:

Romac style 306

Ford style FS 300

Powerseal 3412AS

Cascade CSC2

2.10. YARD HYDRANTS

2.10.1. GENERAL

Yard hydrants, where allowed by the Engineer, shall be brass ¾” frost proof type equipped

with a brass vacuum breaker. The valve stem and plunger assembly shall be removable

for inspection and repair without the need for digging up of the hydrant.

2.10.2. CONSTRUCTION

Hydrant barrel: 1” brass.

Inlet connection: 3/4” NPT in brass casting.

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Nozzle: heavy duty ¾” brass hose thread.

Bury depth: 7 feet.

Paint: Standard Red above ground line.

Acceptable manufacturers are Merril Any Flow Brass Frost Proof or equal.

2.11. TRACER WIRE AND TRACER WIRE ACCESSORIES

2.11.1. GENERAL

All tracer wire and tracer wire accessories (connectors, splices, access points, and

magnesium ground rods) shall be domestically manufactured in the USA. Tracer wire shall

be installed along all water mains, water services, and sanitary sewer force mains unless

otherwise noted in these plans. All system components, including tracer wire and tracer

wire accessories must be compatible. Tracer wire and tracer wire accessories shall be

considered incidental to other items.

2.11.2 TRACER WIRE

All tracer wire shall meet the following criteria:

All tracer wire shall have HDPE insulation and color coded per APWA standards

for specific utility being marked

Must carry a radio signal to aid in locating buried underground utilities

Certified to meet ASTM B170 specification for oxygen-free electrolytic copper

Certified to meet ASTM B869 specification for 21% conductivity, hard drawn,

copper-clad steel wire

Certified to meet ASTM D1238 specification for polyethylene plastics extrusion

materials

The wire shall be identified by surface marking indicating manufacturer’s

identification, conductor size, and other appropriate information.

Tracer wire to be used for direct bury shall meet the following criteria:

12 AWG copper clad carbon steel core with HDPE coating (30 mil thickness) and

minimum 450 lb. break load

Tracer wire to be used for directional drilling and boring shall meet the following criteria:

12 AWG copper clad carbon steel core with HDPE coating (45 mil thickness) and

minimum 1,150 lb. break load

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Tracer wire to be used for pipe bursting and slip lining shall meet the following criteria:

7 x 7 stranded copper clad steel with HDPE coating (50 mil thickness) and

minimum 4,700 lb. break load

2.11.3 TRACER WIRE CONNECTORS

Tracer wire connectors shall be used to interconnect tracer wire at the intersection of mains

and laterals. Non-locking, friction fit, twist on wire nuts, or taped connectors are

prohibited.

Tracer wire connectors to be used for direct bury, directional drilling, and boring shall meet

the following criteria:

Pre-filled with dielectric silicon that never hardens.

Waterproof and corrosion proof.

Manufactured for the wire gauge being installed.

Designed for direct bury and low voltage up to 50V.

Connectors used for direct bury, directional drilling, and boring shall be “DryConn Direct

Bury Lug Aqua”, “Copperhead Mainline to Service Connector”, or approved equal.

Tracer wire connectors to be used for pipe bursting and slip lining shall meet the following

criteria:

¼”- 20 slotted stainless steel set screw with 30 volt maximum and shall be

protected from corrosion with a wax pad or other approved anti-corrosive

methods.

Connectors used for pipe bursting and slip lining shall be “SnakeBite Pipe Burst

Connector” or approved equal.

2.11.4 TRACER WIRE SPLICES

Tracer wire splices shall be used to join tracer wires at the end of a spool or when required

to repair damaged tracer wire. End of spool tracer wire splices shall occur no more than

once per 500 feet.

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Tracer wire splices to be used for direct bury, directional drilling, and boring shall be

“DryConn Direct Bury Lug Aqua”, “Copperhead Mainline to Service Connector”,

“Copperhead SnakeBite Locking Connector”, or approved equal.

Tracer wire connectors to be used for pipe bursting and slip lining shall meet the following

criteria:

In-line splices for the 7x7 copper clad steel core tracer wire shall be made with a

30 volt maximum solid brass lug with a set screw locking mechanism. The brass

lug shall be protected with a fast cure heat shrink that creates a weather resistant

connection.

2.11.5 ACCESS POINTS

Tracer wire access points shall be “Copperhead Cobra Access Point”, “Rhino TriView Test

Station”, or approved equal.

Tracer wire access points installed at hydrant locations shall meet the following criteria:

Made of polypropylene material

Direct connection point for utility locater transmitter

Minimum of 2 terminal exterior connection points with a jumper

Tracer wire protection conduit connection opening at the bottom with 1” MTP

thread

Blue in color

Tracer wire access points installed at hydrant locations shall be “Copperhead Cobra Access

Point” or approved equal.

The mounting bracket for connecting tracer wire access points to a hydrant shall be either

a ¾” HDPE flange or a stainless steel flange. To protect tracer wire from weed whips,

mowers, etc., tracer wire shall be run through a tracer wire protection conduit. The tracer

wire protection conduit shall be a minimum 2-foot long piece of 1” HDPE heavy-wall

innerduct with MTP thread on the connection end and an angle-cut buried end.

Tracer wire access points installed at locations other than hydrants or curb stops shall meet

the following criteria:

Temperature stable from -40 degrees Fahrenheit to +150 degrees Fahrenheit

Color coded per APWA standards for specific utility being marked

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Shall be 54” in length

Shall have tracer wire terminal post

Must have a minimum of 2 external terminals ¼” brass shall include a bolt, nut,

washers and ring terminal

TS-SHUNT/ Jumper between the two adjacent terminals shall be rust free

Mounted to a “T” post or “U” Channel

Tracer wire access points installed at locations other than hydrants shall be “Rhino TriView

Test Station” or approved equal.

2.11.6 MAGNESIUM GROUND ROD

Magnesium ground rods shall meet the following criteria:

Shall be a 1.5 lb. drive-in magnesium ground rod

HDPE cap mounted to top of rod

Minimum of 12 foot factory installed 12 AWG copper clad carbon steel core

tracer wire

Magnesium ground rod tracer wire shall be 12 AWG copper clad carbon steel core

with HDPE coating (30 mil thickness) and minimum 450 lb. break load

Magnesium ground rod tracer wire coating shall be red in color

2.12. INSULATION

Insulation shall be in accordance with Section 1200 of these Specifications.

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REVISED 2019

PART 3

CONSTRUCTION

3.1. GENERAL

Excavation, trenching, and backfill shall be done in accordance with Section 1000. Pipe and fittings

shall be handled and laid in accordance with the latest revision of AWWA Standard C600. Pipe and

fittings shall be laid in the location shown on the plans, the exact location being designated by the

Engineer during construction. Before laying any pipe, it shall be cleaned of all foreign matter and

kept clean thereafter. Open ends shall be protected at all times to prevent the entrance of dirt, trench

water, animals or foreign material into the pipe. The bell and spigot shall be wiped clean and

sufficient lubrication placed on the gasket and spigot before the pipe is pushed fully into the bell.

Field cut spigot ends of push-on joints shall be beveled prior to being pushed into the bell. Every

part of the pipe shall be bedded uniformly throughout its length. All handling, field cuts,

polyethylene wrapping, and jointing shall be done as per the manufacturer’s recommendation.

3.2. ALIGNMENT

The Engineering Department will provide line and grade for all water main. All water mains shall

have a minimum cover of 7.5’. Grade shall be maintained by the Contractor using methods

approved by the Engineer. Water mains installed parallel to sanitary sewer shall be laid 10 feet

apart, distance shall be measured edge to edge. Where a water main crosses a sanitary sewer line,

a minimum vertical distance of 18 inches shall be maintained between the outside of the water main

and the outside of the sewer. Deflections from a straight line or grade, where permitted by the

Engineer, shall not exceed the pipe manufacturer’s recommendation.

3.3. THRUST BLOCKS

All fittings shall be braced by means of poured concrete or concrete thrust blocks. No wood thrust

blocks will be allowed. Poured concrete shall be 3000 psi concrete poured against undisturbed earth.

Care shall be taken not to cover up joints, bolts, flanges, and the fittings with concrete.

Thrust restraint at the joints may be used in lieu of concrete thrust blocking with the permission of

the Engineer. Restraint devices for PVC pipe shall meet or exceed the requirements of ASTM F

1674-96 or the latest revision, Standard Test Method for Joint Restraint Products for Use with PVC

Pipe.

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3.4. SETTING HYDRANTS

All hydrants shall be vertically plumb and shall have their pumper nozzle facing and at right angles

to the street. Each hydrant shall be set on a concrete block and blocked behind with concrete

block(s) of sufficient size to prevent settling and horizontal movement. Hydrant bases shall be

backfilled with at least 1/3 cubic yard of 1 ¼” crushed rock to facilitate drainage and covered with

polyethylene plastic film. The 1 ¼” crushed rock shall extend to 6” above the weep hole. After

backfilling the hydrant markers shall be installed 18 inches behind the hydrant.

3.5. CONNECTIONS TO EXISTING WATER MAINS

Connections between new and existing pipes shall use proper specials and fittings to suit the actual

conditions encountered. Suitable facilities shall be provided for proper de-watering, drainage, and

disposal of all water removed from the excavation or pipe without damage to adjacent property.

Prior to the closure of existing water mains, the Contractor shall notify all affected water users.

3.6. WATER MAIN SHUTDOWNS

The Contractor shall coordinate water main shutdowns with the Engineer and the Mains and

Hydrants Department. The Contractor is responsible for gate valve locations and property

notification. The Mains and Hydrants Department will assist with cleaning and operating the valves

if required.

Shutdowns in residential areas may not occur prior to 9:00 AM. Residential water users shall be

notified of the outage by 7:00 PM the night before the planned shutdown.

The Contractor shall schedule outages to non-residential water users in such a manner as to minimize

the impact of the outage to the user. Outage notifications to non-residential water users shall be per

the direction of the Engineer, but in no case shall be given less than 2 working days prior to the

shutdown.

Notifications shall be in writing and shall indicate the estimated duration of the shutdown. A sample

shutoff notification form can be found on the City’s website. If actual shutdown varies from the

stated time by more than one hour, a second verbal notification is required.

The Contractor shall turn on all valves after the necessary water main connections have been made.

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3.7. TEMPORARY WATER SERVICES

If the water to a property is to be out for more than 12 hours, the Contractor will be responsible for

providing a temporary water service to the affected water users. All piping shall be rated for potable

water use. Minimum pipe size shall be 1” diameter for up to 3 service connections, 2” diameter for

4 or more connections. The Contractor shall use larger pipes where necessary to provide adequate

domestic service throughout the duration of the temporary connection. Valves shall be provided on

temporary piping at intervals not to exceed 500 feet. The method of providing the temporary water

service (which hydrant to use, direction to feed, etc.) shall be an option of the Contractor subject to

the approval of the Engineer.

All temporary water mains and services shall be disinfected in accordance with section 1300.3.9.

One water sample per block at the end of a service connection will be taken after the temporary

water line is flushed. The sample shall show the absence of bacteria before connections are allowed.

All mains and services shall be flushed prior to being put into service. No additional contract time

will be allowed for failure to pass bacteria test.

3.8. SETTING VALVES

Valves will be installed where shown on the plans or as directed by the Engineer. Before installing

the valve, care should be taken to ensure that all foreign material has been removed. The stuffing

boxes shall be tightened and the valve opened and closed to see that all parts are in first class working

order. Valves shall be set on block as shown in the details. The body of the valve shall be wrapped

with polyethylene wrap, securely fastened to the pipe on both sides of the valve, as per

ANSI/AWWA C105/A21.5. Valve and valve boxes must be plumb. The valve box adapter shall

be installed on the valve and the valve box shall be placed directly over the operating nut, and the

top of the box being brought flush with finish grade. The Valve box shall be wrapped with

polyethylene plastic film as per section 2.2.6. POLYETHYLENE WRAP. The box shall be backfilled

and thoroughly tamped around the box. After backfilling a wrench shall be dropped on the valve to

ensure that it is operable. Prior to acceptance, the City Water Department will verify that each valve

is easily operable.

3.9. DISINFECTION

All water mains shall be chlorinated as set forth by the latest revision of AWWA Standard C651.

Sufficient chlorine tablets or powder shall be placed in each pipe to furnish a resultant solution of

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50 to 100 parts per million of available chlorine. Generally required dosage to meet this standard is

as follows:

WATER MAIN SIZE REQUIRED DOSAGE

2” 1 LB. PER 10,000 FEET

4” 1 LB. PER 2,500 FEET

6” 1 LB. PER 1,100 FEET

8” 1 LB. PER 700 FEET




The chlorinated water shall remain in the pipe line for at least 24 hours and shall have a residual

chlorine content of at least 5 parts per million at that time. A bacteriological sample will be taken

after the main is flushed and shall show the absence of bacteria before connections are allowed to

the water main. Chlorine disinfection shall be included in the unit bid price for the pipe.

3.10. PRESSURE AND LEAKAGE TESTING

All water main and services shall be subjected to pressure and leakage testing. All services shall be

pressure tested with the main. The Contractor shall furnish all pumping equipment, labor and gauges

required for these tests and if any section of pipe does not meet these tests, the Contractor shall at

his own expense locate and repair the defects and retest the line until it meets the requirements. The

pipe shall be subjected to a hydrostatic test of 150 psi for a period of two hours. Each pressure test

shall be limited to a maximum of 1,500 linear feet of water main. The pressure shall be held within

2 psi of this test pressure for the entire time and leakage shall not exceed the rate established by the

following formula:

𝑄 = (𝐿𝐷√𝑃)/148,000

In which:

Q= maximum permissible leakage rate in gallons per hour for the length of line being

tested.

L= length of the line being tested in feet.

D= internal diameter of the pipe in inches.

P= average test pressure in psig.

In the event that the line contains more than one size of pipe, the allowable leakage for each size

shall be calculated separately and then added to obtain the total allowable leakage allowed for the

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lines being tested. Repairs shall be made by replacing the defective pipe or dismantling the faulty

joint, cleaning, realigning the gland or gasket and reassembling the joint as per the original

specification. Repair sleeves may only be used if approved by the Engineer and shall have all

stainless steel parts. All cost of locating and repairing the leaks shall be borne by the Contractor.

3.11. BACTERIOLOGICAL TESTING

Bacteriological testing is required on all new and replaced water main before the water main is

placed in service. The tests ensure that the water being introduced into the system has been properly

disinfected and is free of contamination. Only the City inspector may do the testing procedure.

Records are kept of the litmus test, the bacteriological tests, and the chain of custody during the

sample submittal process.

All water samples for bacteriological testing shall be collected from a newly installed water

service. If a project does not include newly installed water services, the Contractor shall supply all

labor and materials necessary to collect the sample. The materials, location, and method for

abandonment/removal of necessary materials shall be approved by the Engineer. Water samples

may not be collected from a fire hydrant.

After final flushing and before the new water main is connected to the distribution system, two

consecutive sets of acceptable samples, taken at least 24 hours apart, shall be collected from the new

main. At least one set of samples shall be collected from every 1,200 feet of new water main. All

samples shall be tested for bacteriological quality in accordance with Standard Methods for the

Examination of Water and Wastewater, and show the absence of coliform organisms and the

presence of a chlorine residual.

The basic procedure is as follows:

1. Insert litmus paper test strip in the discharge stream of the hydrant while it is being flushed.

The color change will indicate that there is residual chlorine content.

2. Before the valves are opened, obtain a sterile sample of the disinfected main. This water

sample will be taken after the completion of the pressure test. 100-ml samples will be

taken with a chlorine neutralizer tablet in the container. The sample must be taken to the

water plant immediately for testing. If this is not possible, the sample must be kept in a

refrigerated container, however, the test must begin within 24 hours. Results will be

available approximately 24 hours from the time the test is admitted.

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3. A second sample is obtained from the same location at least 24 hours after the first sample.

This sample indicates that the residual chlorine content is such that verification is obtained

that the pipe, newly introduced water, and any debris are disinfected. As such, the sample

must be obtained from water that has remained in the new pipe for at least 24 hours. Both

samples must pass the test before the new water main may be opened and put in use in the

distribution system.

4. When flushing the mains, care must be taken to ensure that flow is away from the existing

mains. This may involve flushing ½ block in one direction until the water is clear, and

then closing that valve and flushing from the other end of the block for a mid-block hydrant.

If the initial disinfecting fails to produce satisfactory results, the main shall be reflushed and re-

sampled. If check samples also fail, the main shall be rechlorinated by the continuous feed or slug

method until satisfactory results are obtained.

The Contractor should note that the testing tank may require sterilization in order to avoid

contamination of the mains during the testing process. The pipe installation crews will need to

ensure that the pipes are free of dirt, debris and other matter. It must be remembered that the final

water quality test is not the primary means for certifying the sanitary condition of the main. The

sanitary handling of materials, the construction practices, and the continual inspection of the work

are the primary means for ensuring the sanitary condition of the water main.

The Contractor shall assist the inspector as necessary to obtain the samples. All costs for the

disinfection and testing of water mains shall be incidental to the bid price for the water main.

3.12. TRACER WIRE SYSTEM

3.12.1. GENERAL

Tracer wire shall be installed below the spring line of pipes and fittings. Tracer wire shall

be securely fastened to the water main pipe with tape or plastic ties at every pipe bell or at

20 foot intervals, whichever is less. In addition, tracer wire shall be secured within 1 foot

of all underground utility appurtenances. The maximum mainline spacing for a tracer wire

access point shall be no greater than 600 linear feet. End of spool tracer wire splices shall

occur no more than once per 500 feet. All lateral tracer wires shall be a single wire,

connected to the mainline tracer wire using an approved tracer wire connector. Looping or

coiling of wire is not allowed.

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Minimum requirements for the number of tracer wire lines are as follows:

One wire shall be used for direct bury installations

Two wires shall be used for directional drilling/ boring installations

One 7x7 extreme strength copper clad steel core tracer wire shall be used for pipe

bursting/ slip lining installations.

Any damage occurring during installation of the trace wire must be immediately repaired

by removing the damaged wire and installing a new section of wire with approved

connectors and/or splicing kits. Taping and/or spray coating is not allowed. Mainline trace

wire shall not be connected to existing conductive pipes.

All costs associated with the installation and testing of the tracer wire shall be considered

incidental to other items.

3.12.2. TRACER WIRE CONNECTORS

Tracer wire connectors shall be used to interconnect tracer wire at the intersection of mains

and laterals. Tracer wire connectors shall be installed in accordance with the

manufacturer’s installation instructions. The mainline tracer wire shall not be cut.

3.12.3. TRACER WIRE SPLICES

Tracer wire splices shall be used to join tracer wire at the end of a spool or when required

to repair damaged tracer wire. End of spool tracer wire splices shall occur no more than

once per 500 feet.

3.12.4. TRACER WIRE ACCESS POINT

At each hydrant, the tracer wire and the magnesium ground rod tracer wire shall be routed

up the side of the hydrant, through the tracer wire protection conduit, and connected to the

access point. The Contractor shall leave 2 feet of tracer wire and magnesium ground tracer

wire slack in the tracer wire protection conduit.

At locations other than hydrants or curb stops, tracer wire and the magnesium ground rod

tracer wire shall be ran into a “Rhino TriView Test Station” or approved equal access

point. The access point shall be mounted to a “U” channel post. The Contractor shall leave

2 feet of tracer wire and magnesium ground tracer wire slack in the “Rhino TriView Test

Station” or approved equal access point.

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Tracer wire shall not be mounted to the lid of gate valves or other devices that are located

within the pavement section.

3.12.5. TRACER WIRE MAGNESIUM GROUND RODS

Tracer wire must be properly grounded at all hydrants. Grounding of trace wire shall be

achieved by use of a drive-in magnesium ground rod specifically manufactured for this

purpose and shall be driven into virgin ground below the pipe bedding. The lateral tracer

wire and the magnesium ground rod tracer wire shall be ran up the hydrant through the

tracer wire protection conduit and connected to the access point. The Contractor shall leave

2 feet of tracer wire and magnesium ground rod tracer wire slack in the tracer wire

protection conduit.

3.12.6. TRACER WIRE ELECTRICAL CONDUCTIVITY TEST

All new tracer wire installations shall be located using typical low frequency (512Hz) line

tracing equipment furnished by the Contractor and witnessed by the Contractor and

Engineer prior to acceptance of ownership.

This verification shall be performed upon completion of rough grading and again prior to

final acceptance of the project.

Continuity testing in lieu of actual line tracing shall not be accepted. All areas failing the

location test shall be corrected at the Contractor’s expense. The wire shall be tested in

accordance with the requirements of ASTM B-1, B-3, B-8 and D-1248.

3.12.7. ELECTRICAL CONDUCTIVITY TEST FOR DUCTILE IRON

The Contractor shall perform a conductivity test one week after completion of pressure

testing of the water main on all ductile iron pipe water main. This shall be performed in a

timely manner to ensure acceptable conductivity prior to further construction.

On water main reconstruction projects, the Contractor shall perform the conductivity test

prior to service line reconnections to ensure main line isolation from house services.

SECTION 1300


REVISED 2019

The Engineer and Owner may require a Contractor to test the first section of pipe installed

to demonstrate the Contractors ability to install the pipe in an acceptable manner. When

the connection to the existing system is not made with a valve, the Contractor shall test the

existing section to the first available valve(s) to determine the condition of the existing

system, or the Contractor may make provisions to test his work separately, prior to

connection to the existing system, in a manner acceptable to the Engineer.

The system (pipeline, valves, fittings and hydrants) shall be tested for electrical continuity

and current capacity. The electrical test shall be made after the hydrostatic test and while

the line is at normal operating pressure. Backfilling shall have been completed. The line

may be tested in sections of convenient length as approved by Engineer.

Direct current of 350 amperes plus or minus 10%, shall be passed through the pipeline for

5 minutes. Current flow through the pipe shall be measured continuously on a suitable

ammeter and shall remain steady without interruption or fluctuation throughout the 5-

minute test period.

Insufficient current or intermittent current or arcing, indicated by large fluctuation of the

ammeter needle, shall be evidence of defective contact in the pipeline. The cause shall be

isolated and corrected. Thereafter, the section in which the defective test occurred shall be

retested as a unit and shall meet the requirements.

Sources of D.C. for these tests may be motor generators, arc welding machines, or other

approved sources. All such equipment shall be furnished by the Contractor.

Cables from the power source to the section of system under test should be a sufficient size

to carry the test current without overheating or excessive voltage drop.

After the test, the hydrant shall be shut off and cap loosened to allow hydrant drainage.

Tighten cap after drainage.

SECTION 1300


REVISED 2019

3.13. FINAL INSPECTION

The Contractor and the City of Fargo representative will operate all main valves and inspect all stop

boxes for access. This procedure will be accomplished after all clean up, etc. has been completed.

This inspection will be made prior to the final payment for work performed. Any defects shall be

promptly repaired by the Contractor at his cost.

SECTION 1300


REVISED 2019

PART 4

GUARANTEE, MEASUREMENT & PAYMENT

4.1. GUARANTEE

The guarantee shall be per the contract.

4.2. MEASUREMENT AND PAYMENT

4.2.1. GENERAL

The cost of excavation, trenching, and backfill shall be included as part of this

specification.

4.2.2. WATER MAIN PIPE

Pipe will be measured by customary and conventional methods and paid for on a unit price

basis for the actual length installed.

Measurement will be from the center of the fitting or valve to the center of the next fitting

or valve. The unit price shall include the cost of the pipe, jointing material, tracer wire and

tracer wire accessories, concrete thrust blocking or joint restraint and all other appurtenance

costs except valves, hydrants, and fittings, completely installed in accordance with the

Specifications.

4.2.3. FITTINGS

Unless otherwise noted on the plans, water main fittings will be measured by the pound

without joint accessories or cement lining. The weight for fittings not listed in the tables

below shall be in accordance with AWWA C153. The weight for fittings not listed in the

tables below or in AWWA C153 shall be the actual weight of the fitting(s) furnished and

installed based on acceptable documentation provided by the Contractor. The standard

weight of water main fittings, for payment purposes, shall be as follows:

SECTION 1300


REVISED 2019

Bends, Caps, and Plugs

Size

Fitting Weights, lbs. (AWWA C153)

Bends (degrees)

Caps Plugs Sleeves 90 45 22.5 11.25

4 25 22 18 16 9 10 20

6 39 32 31 30 15 16 29

8 57 46 46 42 22 26 45

10 89 70 64 58 32 36 61

12 108 86 80 67 42 46 76

14 210 160 136 93 66 75 128

16 264 202 172 148 92 95 159

20 400 305 310 245 125 135 236

24 565 405 412 315 166 175 306

Tees, Crosses, and Reducers

Fitting Weights, lbs.

(AWWA C153) Fitting Weights, lbs.

(AWWA C153)

Run Branch

Tee Cross Reducer

Run Branch

Tee Cross Reducer Large Small Large Small

4 4 32 40 16 6 228 240 124

6 4 46 57 24 16 8 248 260 124

6 6 56 75 16 10 264 317 124

8 4 60 68 32 16 12 280 306 112

8 6 72 74 36 16 14 316 140

8 8 86 105 16 16 322 385

10 4 78 112 46 20 6 315

10 6 90 119 47 20 8 345 379

10 8 105 124 50 20 10 370 220

10 10 120 145 20 12 395 413 205

12 4 94 119 58 20 14 440 200

12 6 110 126 58 20 16 465 200

12 8 125 149 57 20 20 535

12 10 140 179 61 24 6 415

12 12 160 213 24 8 445 481

14 4 172 24 10 470

14 6 182 200 100 24 12 500 529 305

14 8 206 228 100 24 14 550 306

14 10 228 100 24 16 580 576 320

14 12 234 100 24 20 660 1589 300

14 14 280 299 24 24 720

SECTION 1300


REVISED 2019

4.2.4. VALVES

Valves will be paid for under the unit price bid per each complete in place. The unit price

will include the valve, jointing material, valve box, valve box adaptor, concrete blocking,

necessary extensions, and all other work necessary for a complete and workable valve

installation.

4.2.5. HYDRANTS AND YARD HYDRANTS

Hydrants will be paid for under the unit price bid per each complete in place. The unit

price will include the hydrant with hydrant marker, rock bedding, blocking, excess

excavation and all other work necessary for a complete and workable hydrant installation.

4.2.6. POLYETHYLENE WRAP

Polyethylene wrap shall be included in the unit bid price for ductile iron pipe, fittings,

hydrants, and valves. All material, labor, equipment and incidental costs necessary to

install the plastic wrap shall be included.

4.2.7. DISINFECTION AND TESTING WATER MAINS

Disinfection and testing of water mains shall be incidental to the bid price for the water

main. Payment will not be made for water main until such time as it has been successfully

tested.

4.2.8. TAPPING SLEEVES AND VALVES

The unit bid price shall include the cost of furnishing and installing the tapping sleeve and

valve. The City of Fargo Water Department will make the tap for 12” and smaller taps.

On taps larger than 12”, the Contractor shall make arrangements with other entities to make

the tap. For connections made to the water main that are not made under city contract the

Contractor will be billed for the connection by the City Water Department.

4.2.9. TRACER WIRE

The tracer wire system and electrical conductivity testing shall be considered incidental to

water main construction.

SECTION 1300


REVISED 2019

4.2.10. OTHER COSTS

All other costs for work necessary to properly complete the work specified herein shall not

be bid items; the costs shall be charged to other items unless a bid item is specifically

included on the bid sheet.

ENGINEERINGDEPARTMENT

WATER MAINTRENCH BACKFILL

SECTION: 1300 DRAWING: 5.1

APPROVED:

REVISION: 2019

DATE:


WATER MAIN TRENCHUNDER NEW PAVEMENT


APPROVED:

REVISION: 2019

DATE:

·

·

·

·

TABLE OF REQUIRED BEARING AREAS


WATER MAINTHRUST BLOCKING


APPROVED:

REVISION: 1999

DATE:

·

·

·

TYPICAL INSTALLATIONS

2" TO 12" DIA. 14" TO 36" DIA.

RESTRAINED LENGTHS OF PVC PIPEENGINEERINGDEPARTMENT

RESTRAINT DEVICE FORPVC PIPE BELL JOINTS


APPROVED:

REVISION: 1999

DATE:

·

·

·

·


RESTRAINEDMECHANICAL JOINT


APPROVED:

REVISION: 2019

DATE:

·

·

·

·


AMERICAN DARLINGHYDRANT CONNECTIONS


APPROVED:

REVISION: 2019

DATE:

·

·

·

·


WATEROUS HYDRANTCONNECTIONS


APPROVED:

REVISION: 2019

DATE:

WM

WM

WM

WM

WM

WATERMAIN IN BOULEVARD

WATERMAIN UNDER ROADWAY

PLAN VIEW

PLAN VIEW


HYDRANT MARKERDETAIL


APPROVED:

REVISION: 2019

DATE:

·

·


WATER MAINTAPPING SADDLE


APPROVED:

REVISION: 2019

DATE:

·

·

·


WATER MAINRELOCATION DETAIL


APPROVED:

REVISION: 2019

DATE:


FROST PROOFYARD HYDRANT


APPROVED:

REVISION: 2019

DATE:


VALVE TRACERWIRE DETAIL


APPROVED:

REVISION: 2019

DATE:


MAINLINE TRACER WIREDETAIL


APPROVED:

REVISION: 2019

DATE:


FIRE HYDRANT TRACERWIRE DETAIL


APPROVED:

REVISION: 2019

DATE:

HYDRANT - PLAN VIEWNOT TO SCALE

HYDRANT - PROFILE VIEWNOT TO SCALE

city of fargo specifications water mains€¦ · 12 awg copper clad carbon steel core with hdpe...

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